Just calling money fiat is like calling people "infidel" :D

Bitcoin maximalism has immediate parallels to religious doctrine that regular currencies do not.

1) Divine creator whose existence is impossible to prove

2) A holy book: (whitepaper) that's taken as absolute truth and therefore doesn't require any revisions or updates. Proposed changes to core beliefs create split factions (BTC v BCH, Old v New Testament, or the Shia-Sunni split in Islam).

3) Monotheism: Belief in the primacy of Bitcoin blockchain over all other competing chains, and warning of divine punishment for apostates (NGMI).

Well before bitcoin, I never felt comfortable with dollar bills stating "In God We Trust" on the back.

They were actually introduced to dollar bills (and mandated on all money) relatively recently: in the 1950s, as a symbolic effort to oppose communism.

Fiat is the best fine tuned PoS system we have.

Is it perfect? No.

Is it ages ahead of Bitcoin? Yes